He said Mr Corbyn had been “accessible, gracious and generous” during their encounter.

But the Labour boss insists he didn’t mean to pose for the picture and does not endorse Mr Peled’s views.

The activist caused fury last year when he listed Holocaust denial as an issue that should be allowed to be discussed under free-speech principles.

At the previous Labour conference, he said: “This is about free speech, the freedom to criticise and to discuss every issue, whether it's the Holocaust - yes or no, Palestine, the liberation, the whole spectrum. There should be no limits on the discussion.”